Implement LWG issue 2301: Mark std::tie as constexpr

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@202158 91177308-0d34-0410-b5e6-96231b3b80d8
2014-02-25 16:11:46 +00:00
parent 4ffb67eca5
commit 8e554d93da
3 changed files with 12 additions and 3 deletions
--- a/test/utilities/tuple/tuple.tuple/tuple.creation/tie.pass.cpp
+++ b/test/utilities/tuple/tuple.tuple/tuple.creation/tie.pass.cpp
@@ -27,4 +27,13 @@ int main()
        assert(i == 42);
        assert(s == "C++");
    }
+#if _LIBCPP_STD_VER > 11
+    {
+        static constexpr int i = 42;
+        static constexpr double f = 1.1;
+        constexpr std::tuple<const int &, const double &> t = std::tie(i, f);
+        static_assert ( std::get<0>(t) == 42, "" );
+        static_assert ( std::get<1>(t) == 1.1, "" );
+    }
+#endif
 }